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Configuration:

 

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Advanced TCP/IP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LAN Configuration fields and buttons (continued)

 

 

 

 

 

 

Field or Button

Description

 

 

 

 

 

 

 

 

 

 

 

 

Enable DHCP Server

If selected, the DHCP server on the voice gateway assigns IP addresses to the computers

 

and other hosts on your network, if they have DHCP enabled (see “Configuring TCP/IP” on

 

page 52). By default, the voice gateway DHCP server is enabled.

 

If there is another DHCP server running on your network (on another router), you must

 

disable one of the DHCP servers.

Enable ISP

If Enable DHCP Server is selected, selecting this option causes the systems on the VT2142

DNS,SNTP

LAN to use the domain name system (DNS) on the WAN side. Each system on the LAN is

 

provided with:

 

IP address 192.168.15.x

 

Gateway: 192.168.15.1

 

If Enable IPS DNS,SNTP is selected, the ISP may also transmit other data to the computers

 

on the VT2142 LAN, including, but not limited to, the time, log, cookie, print, NTP, and WINS

 

servers.

Start IP

Sets the first IP address assigned by the DHCP server, in dotted-decimal format. It must be

 

greater than the IP address value of the voice gateway. For example, if the IP address of the

 

voice gateway is 192.168.15.1 (default), the starting IP address must be 192.168.15.2 (or

 

higher).

End IP

Sets the final IP address assigned by the DHCP server, in dotted-decimal format. It cannot

 

exceed the subnet limit of 254. For example, the default is 192.168.15.254. If the DHCP

 

server runs out of DHCP addresses, users cannot access network resources. If this happens,

 

increase the End IP (to the limit of 254) or reduce the Lease Time.

 

If you change Start IP or End IP, be sure they are in the range for specified by the Subnet IP

 

Address and Netmask. For example, if the voice gateway IP address is 192.168.15.1 (the

 

default) and you set Start IP and End IP to 192.168.0.2 and 192.168.0.100, respectively,

 

computers with DHCP enabled cannot communicate with the voice gateway.

Lease Time

Sets the time, in seconds, that a network computer remains connected to the voice gateway

 

using its current assigned IP address. At the end of this time, the DHCP server renews the

 

lease or assigns the computer a new IP address. The default is 3600 seconds (1 hour). The

 

maximum is 999999 seconds (about 278 hours).

Enable DHCP Relay

If selected, the voice gateway forwards requests and responses between the computers on

 

your network (the DHCP clients) and the DHCP server you chose to use for your network.

Relay IP

If you select Enable DHCP Relay, type the IP address of the DHCP server in dotted-decimal

 

format.

Server and Relay Off

If selected, you must carefully configure the IP address, Subnet Mask, and DNS settings of

 

every host on your network. Do not assign the same IP address to more than one host. Your

 

voice gateway must be on the same subnet as the other hosts.

VT2142 Voice Gateway User Guide

21

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Motorola VT2142 manual Enable Dhcp Server, Enable ISP, Start IP, End IP, Lease Time, Enable Dhcp Relay, Relay IP